Two dozen random shootings occurred last fall in a four-county area. One man was hurt. In a separate but related case, the Michigan Attorney General’s Office is prosecuting Casteel, a 43-year-old unemployed geologist,on terrorism and other charges in Livingston County.

Authorities haven’t said what they believe is the motive behind the two-dozen shootings that took place along a 100-mile I-96 corridor Oct. 16 through Oct. 18, then stopped until Oct. 27 when a man was shot in the backside while driving on I-96 near the Fowlerville exit. He was the only person injured.